There is also a full-length video of the service from which this sermon was taken.
Acts 1:6-14 (NIV)
6So when they met together, they asked him, “Lord, are you at this time going to restore the kingdom to Israel?” 7He said to them: “It is not for you to know the times or dates the Father has set by his own authority. 8But you will receive power when the Holy Spirit comes on you; and you will be my witnesses in Jerusalem, and in all Judea and Samaria, and to the ends of the earth.” 9After he said this, he was taken up before their very eyes, and a cloud hid him from their sight. 10They were looking intently up into the sky as he was going, when suddenly two men dressed in white stood beside them. 11“Men of Galilee,” they said, “why do you stand here looking into the sky? This same Jesus, who has been taken from you into heaven, will come back in the same way you have seen him go into heaven.” 12Then they returned to Jerusalem from the hill called the Mount of Olives, a Sabbath day’s walk from the city. 13When they arrived, they went upstairs to the room where they were staying. Those present were Peter, John, James and Andrew; Philip and Thomas, Bartholomew and Matthew; James son of Alphaeus and Simon the Zealot, and Judas son of James. 14They all joined together constantly in prayer, along with the women and Mary the mother of Jesus, and with his brothers.